1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
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39 This is a partial implementation for fetching/creating memcached_server_st objects.
41 #include <libmemcached/common.h>
44 static inline void _server_init(memcached_server_st
*self
, memcached_st
*root
,
45 const char *hostname
, in_port_t port
,
46 uint32_t weight
, memcached_connection_t type
)
48 self
->options
.is_shutting_down
= false;
49 self
->options
.is_dead
= false;
50 self
->number_of_hosts
= 0;
51 self
->cursor_active
= 0;
53 self
->cached_errno
= 0;
55 self
->io_bytes_sent
= 0;
56 self
->server_failure_counter
= 0;
57 self
->weight
= weight
? weight
: 1; // 1 is the default weight value
58 WATCHPOINT_SET(self
->io_wait_count
.read
= 0);
59 WATCHPOINT_SET(self
->io_wait_count
.write
= 0);
60 self
->major_version
= UINT8_MAX
;
61 self
->micro_version
= UINT8_MAX
;
62 self
->minor_version
= UINT8_MAX
;
64 self
->read_ptr
= self
->read_buffer
;
65 self
->cached_server_error
= NULL
;
66 self
->read_buffer_length
= 0;
67 self
->read_data_length
= 0;
68 self
->write_buffer_offset
= 0;
69 self
->address_info
= NULL
;
70 self
->address_info_next
= NULL
;
74 self
->next_retry
= root
->retry_timeout
;
82 self
->limit_maxbytes
= 0;
89 strncpy(self
->hostname
, hostname
, NI_MAXHOST
- 1);
93 static memcached_server_st
*_server_create(memcached_server_st
*self
, const memcached_st
*memc
)
97 self
= (memcached_server_st
*)libmemcached_malloc(memc
, sizeof(memcached_server_st
));
100 return NULL
; /* MEMCACHED_MEMORY_ALLOCATION_FAILURE */
102 self
->options
.is_allocated
= true;
106 self
->options
.is_allocated
= false;
109 self
->options
.is_initialized
= true;
114 memcached_server_st
*memcached_server_create_with(const memcached_st
*memc
,
115 memcached_server_write_instance_st self
,
116 const char *hostname
, in_port_t port
,
117 uint32_t weight
, memcached_connection_t type
)
119 self
= _server_create(self
, memc
);
124 _server_init(self
, const_cast<memcached_st
*>(memc
), hostname
, port
, weight
, type
);
127 if (type
== MEMCACHED_CONNECTION_UDP
)
129 self
->write_buffer_offset
= UDP_DATAGRAM_HEADER_LENGTH
;
130 memcached_io_init_udp_header(self
, 0);
136 void memcached_server_free(memcached_server_st
*self
)
139 memcached_quit_server(self
, false);
141 if (self
->cached_server_error
)
142 free(self
->cached_server_error
);
144 if (self
->address_info
)
145 freeaddrinfo(self
->address_info
);
147 if (memcached_is_allocated(self
))
149 libmemcached_free(self
->root
, self
);
153 self
->options
.is_initialized
= false;
158 If we do not have a valid object to clone from, we toss an error.
160 memcached_server_st
*memcached_server_clone(memcached_server_st
*destination
,
161 const memcached_server_st
*source
)
163 /* We just do a normal create if source is missing */
167 destination
= memcached_server_create_with(source
->root
, destination
,
168 source
->hostname
, source
->port
, source
->weight
,
170 if (destination
!= NULL
)
172 destination
->cached_errno
= source
->cached_errno
;
174 if (source
->cached_server_error
)
175 destination
->cached_server_error
= strdup(source
->cached_server_error
);
182 memcached_return_t
memcached_server_cursor(const memcached_st
*ptr
,
183 const memcached_server_fn
*callback
,
185 uint32_t number_of_callbacks
)
187 memcached_return_t rc
;
188 if (memcached_failed(rc
= initialize_const_query(ptr
)))
193 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
195 memcached_server_instance_st instance
=
196 memcached_server_instance_by_position(ptr
, x
);
198 for (uint32_t y
= 0; y
< number_of_callbacks
; y
++)
200 unsigned int iferror
;
202 iferror
= (*callback
[y
])(ptr
, instance
, context
);
209 return MEMCACHED_SUCCESS
;
212 memcached_return_t
memcached_server_execute(memcached_st
*ptr
,
213 memcached_server_execute_fn callback
,
216 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
218 memcached_server_write_instance_st instance
= memcached_server_instance_fetch(ptr
, x
);
220 unsigned int iferror
= (*callback
)(ptr
, instance
, context
);
226 return MEMCACHED_SUCCESS
;
229 memcached_server_instance_st
memcached_server_by_key(const memcached_st
*ptr
,
232 memcached_return_t
*error
)
234 memcached_return_t rc
;
235 memcached_return_t unused
;
240 if (memcached_failed(rc
= initialize_const_query(ptr
)))
246 if (memcached_failed(rc
= memcached_validate_key_length(key_length
, ptr
->flags
.binary_protocol
)))
252 if (ptr
->flags
.verify_key
&& (memcached_key_test((const char **)&key
, &key_length
, 1) == MEMCACHED_BAD_KEY_PROVIDED
))
254 *error
= MEMCACHED_BAD_KEY_PROVIDED
;
258 uint32_t server_key
= memcached_generate_hash(ptr
, key
, key_length
);
259 return memcached_server_instance_by_position(ptr
, server_key
);
263 void memcached_server_error_reset(memcached_server_st
*self
)
265 WATCHPOINT_ASSERT(self
);
269 self
->cached_server_error
[0]= 0;
272 memcached_server_instance_st
memcached_server_get_last_disconnect(const memcached_st
*self
)
274 WATCHPOINT_ASSERT(self
);
278 return self
->last_disconnected_server
;
281 void memcached_server_list_free(memcached_server_list_st self
)
286 for (uint32_t x
= 0; x
< memcached_server_list_count(self
); x
++)
288 if (self
[x
].address_info
)
290 freeaddrinfo(self
[x
].address_info
);
291 self
[x
].address_info
= NULL
;
295 memcached_st
*root
= self
->root
;
296 libmemcached_free(root
, self
);
299 uint32_t memcached_servers_set_count(memcached_server_st
*servers
, uint32_t count
)
301 WATCHPOINT_ASSERT(servers
);
305 return servers
->number_of_hosts
= count
;
308 uint32_t memcached_server_count(const memcached_st
*self
)
310 WATCHPOINT_ASSERT(self
);
314 return self
->number_of_hosts
;
317 const char *memcached_server_name(memcached_server_instance_st self
)
319 WATCHPOINT_ASSERT(self
);
323 return self
->hostname
;
326 in_port_t
memcached_server_port(memcached_server_instance_st self
)
328 WATCHPOINT_ASSERT(self
);
335 uint32_t memcached_server_response_count(memcached_server_instance_st self
)
337 WATCHPOINT_ASSERT(self
);
341 return self
->cursor_active
;
344 const char *memcached_server_error(memcached_server_instance_st ptr
)
346 return ptr
? ptr
->cached_server_error
: NULL
;